Installation of this mod (and any other) is easy as pie.

1.) Go to your Far Cry 2 main folder, example "C:\Program Files (x86)\Steam\steamapps\common\Far Cry 2"

2.) Extract the Data_Win32 folder from this .rar into the main folder.

3.) Choose which version of the game you own and extract that bin folder into your main folder.

4.) Congratulations, you have succesfully installed yet another realism mod.